Cypress CY7C1381D, CY7C1381F, CY7C1383D, CY7C1383F Truth Table for Read/Write

CY7C1381D, CY7C1381F
CY7C1383D, CY7C1383F
Document #: 38-05544 Rev. *F Page 10 of 29
Truth Table for Read/Write [4, 9]
Function (CY7C1381D/CY7C1381F) GW BWE BWDBWCBWBBWA
Read HHXXXX
Read HL HHHH
Write Byte A (DQA, DQPA) HLHHHL
Write Byte B(DQB, DQPB)HLHHLH
Write Bytes A, B (DQA, DQB, DQPA, DQPB)H L H H L L
Write Byte C (DQC, DQPC) HLHLHH
Write Bytes C, A (DQC, DQA, DQPC, DQPA)HLHLHL
Write Bytes C, B (DQC, DQB, DQPC, DQPB)H L H L L H
Write Bytes C, B, A (DQC, DQB, DQA, DQPC,
DQPB, DQPA)
HLHLLL
Write Byte D (DQD, DQPD)HLLHHH
Write Bytes D, A (DQD, DQA, DQPD, DQPA)H L L H H L
Write Bytes D, B (DQD, DQA, DQPD, DQPA)H L L H L H
Write Bytes D, B, A (DQD, DQB, DQA, DQPD,
DQPB, DQPA)
HLLHLL
Write Bytes D, B (DQD, DQB, DQPD, DQPB)HLLLHH
Write Bytes D, B, A (DQD, DQC, DQA, DQPD,
DQPC, DQPA)
HLLLHL
Truth Table for Read/Write [4, 9]
Function (CY7C1383D/CY7C1383F) GW BWE BWBBWA
Write Bytes D, C, A (DQD, DQB, DQA, DQPD,
DQPB, DQPA)
HLLL
Write All Bytes H L L L
Write All Bytes L X X X
Read H H X X
Read H L H H
Write Byte A – (DQA and DQPA)HLHL
Write Byte B – (DQB and DQPB)HLLH
Write All Bytes H L L L
Write All Bytes L X X X
Note:
9. Table only lists a partial listing of the byte write combinations. Any combination of BWX is valid. Appropriate write will be done based on which byte write is active.
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